共查询到19条相似文献，搜索用时 187 毫秒
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猪脂肪性状因能影响肉质和育肥效率而占有重要的地位,与此同时,猪被视为研究人类肥胖症和代谢症候群等诸多疾病的模型动物。当前人类,由于脂肪过度沉积而蔓延全球的肥胖症已演变为一个十分严峻的问题,因此,比较基因组学的运用将会为遗传上研究脂肪和肥胖带来新的视点。脂肪性状是由多个微效基因控制的数量性状,这些遗传因子的相关系数在0.5左右。对猪全基因组扫描显示有500多个数量性状基因座(Quantitative Trait Locus,QTL)跟脂肪形成有关;进一步研究表明:与之相关的多个候选基因多态性已分析出来,包括基因编码的LEP及其受体LEPR、IGF2、FABP3、FABP4、MC4R及FTO。在这些因子中,对猪脂肪形成起到关键作用的是IGF2;与人类肥胖症最为密切的是FTO,然而,该基因对猪脂肪形成作用并不是十分明显。随着功能基因组学的发展,逐步揭示出更多跟脂肪沉积和油脂代谢相关的基因。近年来,以RNA干扰为主的表观基因组学被认为是获得与脂肪沉积相关基因的重要途径。总之,就现有研究成果来看,脂肪性状多态性的遗传背景是高度相关的。 相似文献
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《畜牧与兽医》2020,(2):7-12
为了研究猪长链脂酰辅酶A合成酶1(ACSL1)基因在脂肪沉积中的作用,采用多种生物信息学软件和分子生物学方法,分析了猪ACSL1基因的理化性质、序列特征和蛋白结构,并且检测了猪ACSL1基因在皮杜长大杂交猪皮下和肌内脂肪高低组中的表达情况,以及其与二花脸猪皮下脂肪性状的关联。结果显示:猪ACSL1基因是一种稳定蛋白,其二级和三级结构以α-螺旋和不规则卷曲为主,存在1个跨膜结构域和真核长链脂肪酸辅酶A合成酶家族的保守结构域;ACSL1基因在皮杜长大杂交猪皮下和肌内脂肪高低组中的表达均没有显著差异(P>0.05);进一步检测发现ACSL1基因上游调控区c.-33A>G位点的二花脸猪AA基因型个体在活体肩胛后沿处、胸腰结合处、腰荐结合处和活体平均背膘厚度上均显著高于GG基因型个体(P<0.05)。提示:ACSL1基因可以显著影响二花脸猪的活体皮下脂肪沉积,结果可为ACSL1基因应用于猪脂肪性状的分子改良提供参考依据。 相似文献
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《畜牧与兽医》2020,(8)
为探讨肌肉生长抑制素(MSTN)对猪前体脂肪细胞脂解的调控作用及其分子机制,本研究以原代培养的猪前体脂肪细胞为研究对象,在诱导分化的同时,分别进行0(对照组)、25、50和100 ng/mL MSTN重组蛋白处理。结果显示,与对照组相比,25、50、100 ng/mL MSTN处理48 h后,猪脂肪细胞内甘油三酯(TG)沉积量下降,且显著增加了细胞上清中甘油和游离脂肪酸的释放量,呈浓度依赖性抑制。进一步研究表明,与对照组相比,100 ng/mL MSTN处理显著抑制了脂滴包被蛋白(Perilipin)和脂肪分化相关蛋白(ADRP)的mRNA及蛋白表达,并显著促进了脂肪分解的2种关键限速酶激素敏感性脂肪酶(HSL)和脂肪甘油三酯脂酶(ATGL)的mRNA及蛋白表达。综上可知,MSTN主要通过抑制Perilipin和ADRP的表达,降低其对脂滴的保护作用,增加HSL和ATGL接触脂滴的机会,促进了HSL和ATGL对猪脂肪细胞内TG的脂解作用,从而减少了TG的沉积量。研究结果为确认MSTN作为改善猪肉品质的分子靶点提供了理论支撑。 相似文献
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本试验旨在研究赖氨酸(Lys)对奶牛乳腺上皮细胞(BMECs)内乳脂肪合成相关基因和蛋白表达的影响,探讨Lys影响乳脂肪合成的机理。将第3代BMECs随机分为6组,每组6个重复,每个重复1个培养孔。各组培养基中Lys的浓度分别为0.5(基础培养基,对照)、1.0、2.0、4.0、8.0和16.0mmol/L,37℃、5%CO2培养48h后测定BMECs甘油三酯(TAG)含量、乳脂肪合成相关基因和蛋白的表达量。结果表明:BMECs内TAG含量(P=0.013)以及脂肪酸结合蛋白3(FABP3,P=0.001)、脂蛋白脂酶(LPL,P=0.096)、脂肪酸合成酶(FASN,P=0.003)、乙酰甘油磷酸脂酰转移酶6(AGPAT6,P=0.038)和甘油-3-磷酸酰基转移酶(GPAM,P=0.022)基因表达量对Lys呈显著或趋于显著的浓度依赖效应。FABP3基因表达量以2.0、4.0、8.0、16.0mmol/L组和LPL基因表达量以1.0、2.0、4.0、8.0、16.0 mmol/L组显著高于0.5mmol/L组(P0.05);FASN基因表达量以2.0mmol/L组最高,显著高于16.0mmol/L组(P0.05);硬脂酰辅酶A去饱和酶1(SCD1)基因表达量以2.0、4.0mmol/L组显著高于其他组(P0.05);磷脂酸磷酸酯酶1(LPIN1)、嗜乳脂蛋白亚家族1成员1(BTN1 A1)和黄嘌呤脱氢酶(XDH)基因表达量均以1.0、2.0、4.0、8.0mmol/L组显著高于0.5mmol/L组(P0.05);过氧化物酶体增殖物激活受体γ(PPARγ)基因及蛋白表达量均以2.0、4.0mmol/L组显著高于0.5和8.0、16.0mmol/L组(P0.05);固醇调节元件结合蛋白1(SREBP1)基因表达量以1.0、2.0、4.0mmol/L组显著高于其他组(P0.05),蛋白表达量以1.0 mmol/L组显著高于其他组(P0.05)。但高浓度Lys抑制AGPAT6和GPAM的基因表达,AGPAT6基因表达量以2.0、4.0、8.0、16.0mmol/L组显著低于0.5、1.0mmol/L组(P0.05),GPAM基因表达量以16.0mmol/L组显著低于0.5、1.0、2.0、4.0mmol/L组(P0.05)。可见,Lys对BMECs的乳脂肪合成具有显著的促进效果,但高浓度的Lys抑制了乳脂肪合成相关基因的表达。本试验条件下,培养基中Lys适宜浓度为2.0~4.0mmol/L。 相似文献
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合作猪是生长在高寒草原以放牧为主的珍稀高原型猪种,为了探讨其品种特性的分子机制,分析测定了原产地合作猪及长期在不同环境和饲养条件下异地饲养合作猪脂肪组织脂肪生成的关键酶脂肪合成酶(FAS)、乙酰辅酶A羧化酶(ACC)1和转录因子固醇调控元件结合蛋白(SREBP)-1c、碳水化合物调控元件结合蛋白(ChREBP)mRNA表达水平,并与杜×大×长三元杂交猪进行了对比。试验结果发现,合作猪脂肪组织FAS、ACC1及ChREBP mRNA水平显著低于三元杂交猪(P<0.05),在长期异地饲养后,这些基因mRNA表达水平提高(P<0.05),而SREBP-1c mRNA表达水平在3个群体中没有明显变化(P>0.05)。结果提示,合作猪由于对低能量、低碳水化合物粗饲的长期适应,表现出脂肪组织生脂基因表达水平较低的生理学特性。 相似文献
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民猪具有良好的抗寒能力，研究表观遗传对民猪脂肪细胞分化的影响，揭示民猪脂肪细胞分化的分子机制，将为探索民猪抗寒性状形成原因提供依据。在体外培养的民猪前脂肪细胞培养液中分别添加不同浓度5-Aza-CdR和TSA处理一定时间，MTT法和流式细胞术检测前脂肪细胞活率，确定最适处理浓度；用最适浓度的5-Aza-CdR和TSA处理前脂肪细胞诱导形成成熟脂肪细胞后，分别检测细胞中表观遗传相关基因DNMT1、DNMT3B、ALDH1A3和ALDH1A9，以及脂肪细胞棕色化相关基因ZNF423、PPARα、NCOR1和EBF2的mRNA相对表达量，并用油红O染色观察脂滴形成情况。结果表明，在本实验研究条件下，500 nmol/L的5-Aza-CdR处理48 h和150 nmol/L的TSA处理24 h是对前脂肪细胞生长影响最小的最高浓度，作为后续实验的细胞处理浓度。5-Aza-CdR处理前脂肪细胞后能够降低成熟脂肪细胞中DNMT1、DNMT3B、ZNF423、PPARα、NCOR1和EBF2基因的mRNA相对表达量（P<0.05），并抑制脂滴生成。TSA处理后，成熟脂肪细胞中ALDH1A3和AL... 相似文献
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M Amills D Villalba M Tor A Mercadé D Gallardo B Cabrera N Jiménez J L Noguera A Sànchez J Estany 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2008,125(4):228-233
A C3469T mutation at exon 3 of the pig leptin (Lep) gene has been genotyped in diverse pig breeds yielding controversial results with regard to its association with growth, fatness and carcass traits. A similar situation has been reported for a HpaII restriction fragment length polymorphism (RFLP) in the pig leptin receptor (Lepr) gene, where associations were found depending on the statistical model employed. The main objective of our work was to investigate if leptin plasma concentrations differ in pigs with different C3469T and Lepr HpaII RFLP genotypes. With this aim, we have measured plasma leptin levels at 160 days in 68 Landrace pigs with different Lep C3469T and Lepr HpaII RFLP genotypes. Neither Lep (TT: 11.68 ng/ml, TC: 10.71 ng/ml) nor Lepr (AA: 12.6 ng/ml, AB: 10.93 ng/ml, BB: 11.74 ng/ml) genotypes influenced significantly plasma Lep concentration. Moreover, we did not find any association between Lep and Lepr genotypes and phenotypic variation at growth and fatness traits in a commercial population of 320 Landrace pigs. 相似文献
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Yoshinobu UEMOTO Takashi KIKUCHI Hikaru NAKANO Shuji SATO Tomoya SHIBATA Hiroshi KADOWAKI Kazuo KATOH Eiji KOBAYASHI Keiichi SUZUKI 《Animal Science Journal》2012,83(5):375-385
The leptin receptor (LEPR) gene is considered a candidate gene for fatness traits. It is located on SSC 6 in a region in which quantitative trait loci (QTLs) for backfat thickness (BF), fat area ratios, and serum leptin concentration (LEPC) have previously been detected in a Duroc purebred population. The objectives of the present study were to identify porcine LEPR polymorphisms and examine the effects of LEPR polymorphisms on fatness traits in this same population. The Duroc pigs (226 to 953 pigs) were evaluated for BF, fat area ratios using image analysis, and LEPC. A total of seven single nucleotide polymorphisms (SNPs) in the full‐length LEPR coding region were identified in pigs from the base population. Four non‐synonymous SNPs of the LEPR gene and 15 microsatellite markers on SSC 6 were then genotyped in all pigs. During candidate gene analysis, we detected significant effects of the non‐synonymous SNP c.2002C>T in exon 14 on all traits. In fine mapping analysis, significant QTLs for BF, fat area ratios, and LEPC were detected near the LEPR gene in the same region. These results indicated that the c.2002C>T SNP of LEPR has a strong effect on BF, fat area ratios and LEPC. 相似文献
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In the present study 3 connected F(2) crosses were used to map QTL for classical fat traits as well as fat-related metabolic and cytological traits in pigs. The founder breeds were Chinese Meishan, European Wild Boar, and Pietrain with to some extent the same founder animals in the different crosses. The different selection history of the breeds for fatness traits as well as the connectedness of the crosses led to a high statistical power. The total number of F(2) animals varied between 694 and 966, depending on the trait. The animals were genotyped for around 250 genetic markers, mostly microsatellites. The statistical model was a multi-allele, multi-QTL model that accounted for imprinting. The model was previously introduced from plant breeding experiments. The traits investigated were backfat depth and fat area as well as relative number of fat cells with different sizes and 2 metabolic traits (i.e., soluble protein content as an indicator for the level of metabolic turnover and NADP-malate dehydrogenase as an indicator for enzyme activity). The results revealed in total 37 significant QTL on chromosomes 1, 2, 4, 5, 6, 7, 8, 9, 14, 17, and 18, with often an overlap of confidence intervals of several traits. These confidence intervals were in some cases remarkably small, which is due to the high statistical power of the design. In total, 18 QTL showed significant imprinting effects. The small and overlapping confidence intervals for the classical fatness traits as well as for the cytological and metabolic traits enabled positional and functional candidate gene identification for several mapped QTL. 相似文献
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本试验采用PCR-RFLP方法检测脂滴包被蛋白基因(perilipin,PLIN)在济宁百日鸡、汶上芦花鸡等5个地方鸡种和1个培育品系中的遗传多态性,并分析了多态位点不同基因型与鸡胴体及脂肪性状的相关性。结果发现,在6个供试群体中检测到1个Pst Ⅰ酶切突变位点,测序证实为新发现的鸡PLIN基因2224 bp处G→T突变,该突变位点在供试群体中共检测到两种基因型(A1A1和A1A2),等位基因A1在所有供试群体中均表现为优势等位基因。关联分析结果表明,PLIN基因2224多态位点对鸡胴体性状和脂肪性状影响均不显著(P＞0.05)。多重比较结果表明,A1A1基因型个体在胴体和脂肪性状上总体优于A1A2基因型个体,但各性状均值在两种基因型个体间差异均不显著(P＞0.05)。本研究结果表明,该位点不能作为鸡胴体和脂肪性状的有效分子标记。 相似文献
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Adipocyte fatty-acid binding protein is closely associated to the porcine FAT1 locus on chromosome 4
Mercadé A Pérez-Enciso M Varona L Alves E Noguera JL Sánchez A Folch JM 《Journal of animal science》2006,84(11):2907-2913
We identified 22 polymorphisms in the adipocyte fatty-acid binding protein (FABP4) gene, a strong positional candidate gene for the FAT1 locus in porcine chromosome 4. The most informative polymorphism, an insertion/deletion in intron 1, together with a single nucleotide polymorphism in intron 3, was genotyped in a cross between Iberian and Landrace pigs. After performing QTL, single marker, and haplotype analyses, we showed that there were at least 2 quantitative trait genes in the FAT1 region and that the FABP4 polymorphism was tightly associated to fatness. A comparison of allelic frequencies in a panel of pig breeds suggested that the Del2634C polymorphism was under indirect selection. We also showed that FABP4 is tightly associated to fatness but not growth. Furthermore, a haplotype analysis suggests that there is genetic heterogeneity at the FAT1 locus within the Landrace breed. 相似文献
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试验采用PCR-RFLP方法检测脂滴包被蛋白(perilipin,PLIN)基因内含子6在济宁百日鸡、莱芜黑鸡等4个地方鸡种和1个培育品系中的遗传多态性,分析了多态位点不同基因型与鸡胴体及脂肪性状的相关性。结果发现,在5个供试群体中检测到1个多态位点,测序证实为新发现的鸡PLIN基因2 467 bp处G→A突变,该突变位点在供试群体中检测到3种基因型:A1A1、A1A2和A2A2,2个等位基因:A1和A2。等位基因A1在所有供试群体中均表现为优势等位基因。关联分析结果表明,PLIN基因2 467 bp位点对鸡部分胴体性状和脂肪性状影响显著(P<0.05)。多重比较结果表明,A1A1基因型个体活体重、屠体重、全净膛重、腹脂重和腹脂率均显著高于A2A2基因型个体(P<0.05)。A1A2基因型个体的胸肌肌内脂肪含量显著高于A1A1和A2A2基因型个体(P<0.05)。研究结果表明,PLIN基因对鸡胴体及脂肪性状有一定影响。 相似文献
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ZHOU Yan HAN Hai-xia LU Yan CAO Ding-guo LI Fu-wei LIU Wei GAO Jin-bo LEI Qiu-xia 《中国畜牧兽医》2015,42(10):2695-2700
The genetic polymorphisms in PLIN gene were detected by PCR-RFLP method in four Chinese local chickens including Jining Bairi chicken,Laiwu Black chicken et al.,and one breeding strain.The correlations between the SNP and the carcass and fatness traits were analyzed.As a result,a novel G→A mutation at 2 467 bp in PLIN gene was identified in the five populations.Three genotypes (A1A1,A1A2 and A2A2) were detected,and allele A1 was predominant in all the five experimental populations.The statistical analysis showed that the 2 467 bp polymorphism locus was significant association with some carcass and fatness traits (P<0.05).The living body weight,carcass weight,eviscerated weight,abdominal fat weight and percentage of abdominal fat of A1A1 genotype was higher than A2A2 genotype in chickens (P<0.05).The breast intramuscular fat of A1A2 genotype was higher than that of A1A1 and A2A2 genotypes in chickens (P<0.05).The results showed that PLIN gene had effect on carcass and fatness traits in chickens. 相似文献
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Yan XM Ren J Huang X Zhang ZY Ouyang J Zeng WH Zou ZZ Yang SJ Yang B Huang LS 《Journal of animal science》2009,87(1):334-339
To evaluate the influence of enterotoxigenic Escherichia coli (ETEC) F4 receptors on production traits in pigs, ETEC F4ab, F4ac, and F4ad adhesion phenotypes and 27 traits related to growth, carcass, meat quality, and length of the small intestine in a White Duroc x Erhualian intercross population were measured. Performance data revealed that pigs with the F4ab or F4ac receptor (adhesive phenotypes) had greater (P < 0.01) ADG during the fattening period (from 46 to 240 d) and carcass weight and length at 240 d than pigs lacking the receptors (nonadhesive phenotype). Conversely, animals having the F4ad receptor had less (P < 0.01) ADG during the fattening period and carcass weight than those lacking the receptor. In total, 8 adhesion patterns (A to H) for the 3 F4 strains were observed in this experimental population. Pigs with both F4ab and F4ac receptors (phenotype B) had greater (P < 0.01) ADG, carcass weight, and length at 240 d compared with pigs without the F4 receptors. No difference was found (P > 0.05) in traits related to meat quality, fatness, and length of the small intestine between pigs with or without the receptors. On the basis of the antagonistic relationship between susceptibility to F4ab/ac and production traits, we speculate that the prevalence of the ETEC F4ab/ac adhesive phenotype in pig populations is attributable to balanced natural and artificial selection. 相似文献
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S. Liu S.Z. Wang Z.H. Li & H. Li 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2007,124(4):230-235
Uncoupling proteins (UCPs) are in the mitochondrial inner membrane and belong to the transporter family. The biological function of UCPs is regulating discharge of proton gradient generated by the respiratory chain. As a result, the production of ATP is diminished, and dissipative heat is yielded. The present study was designed to investigate the association of UCP gene with chicken growth and body composition traits. The ninth generation of the broiler lines divergently selected for abdominal fat was used as a research population. Primers for UCP gene were designed from chicken genomic sequence. A single-nucleotide polymorphism, in the exon3 (T1316C) of UCP gene was detected by the polymerase chain reaction and restriction fragment polymorphism (PCR-RFLP) method. The UCP polymorphism was associated with muscle and fatness traits, such as pectoralis minor weight and abdominal fat weight. The results indicated that UCP gene could be a candidate locus or linked to a major gene which affects muscle and fatness traits in chicken. 相似文献